Originally Posted by
Koby
Indeed, not every airport is the same for this. But the general rule is that you have to go through security when arriving from outside Schengen and connecting. (I still have to find the first exception to this rule.)
That's the rule, IIRC - if you're connecting from a non-Schengen country, you have to re-clear security. If you're connecting from a Schengen country, then you may not have to re-clear security, but it depends on the airport.
I'm sure there are obscure rules for overseas territories, island groups and the like.